Trouble with PIR sensor

jheller333

I really appreciate the help. Been struggling with the PIR sensor for a week now. Is there a specific relay I should be looking for? I managed to get everything working with the PIR sensor, but once the TV turns off after there is no input detected, the PIR sensor can’t turn the tv back on. So it is not the most viable solution.

cruunnerr

did u try what i posted?

U said, u tried part 2 of the tutorial. So u should have a “monitor_on.sh” and a “monitor_off.sh”

Try to change the content to the following:

sudo vcgencmd display_power 1 for monitor_on.sh
sudo vcgencmd display_power 0 for monitor_off.sh

or

sudo tvservice -p && sudo chvt 9 && sudo chvt 7 for monitor_on.sh
sudo tvservice -o for monitor_off.sh

If these don’t work at all u should go for the relay.
U could use every relay u want, but u should search for a 3 - 5V relay because otherwise u need to install a transistor.
https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313.TR0.TRC0.H0.Xraspberry+pi+relay.TRS0&_nkw=raspberry+pi+relay&_sacat=0

jheller333

I got a relay and followed your guide to connect it. The relay has an LED light on it but it doesn’t seem to trigger. I still have all the code setup for turning off the HDMI port with the PIR sensor, so I’m not sure if thats the problem. Any suggestions?

cruunnerr

@jheller333

Do u have a link to your relay? Do u hear it clicking?

jheller333

I dont hear it clicking. https://www.creatroninc.com/product/5v-10a-dc-relay-module/?search_query=relay&results=39. Thats the relay i purchased

jheller333

When I run the python script relayPIR.py, the relay clicks and the green light turns on, but once I end that script, the light doesn’t come back on

cruunnerr

hmm… I will check this tomorrow and will give a result

Installed a fresh Raspbian Stretch Desktop and just created the relayPIR.py which runs perfectly. can start and stop whenever i want the script and even autostart on reboot works great.

Hmm… so we used several options and nothing seems to work… You should delete all things we made and start again.

Maybe just try to create the relay script on point 5.2

jheller333

So I deleted everything and started over. Followed your instructions from point 5.2 and it’s still not working. Really not sure where to go from here